package com.qianbei.common.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.widget.GridView;

import com.qianbei.R;


/**
 * Created by wenzheng on 2015/11/7.
 */
public class LineGridView extends GridView {

    private float mStorkWidth = 2.88f;
    public LineGridView(Context context) {
        super(context);
        init();
    }

    public LineGridView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public LineGridView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public void init(){
        mStorkWidth = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,1,getResources().getDisplayMetrics());
    }


    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }


    @Override
    protected void dispatchDraw(Canvas canvas) {
        super.dispatchDraw(canvas);

        View localView1 = getChildAt(0);
        if(localView1 == null){
            return;
        }

        int column = getWidth() / localView1.getWidth();
        int childCount = getChildCount();
        Paint localPaint;
        localPaint = new Paint();
        localPaint.setStyle(Paint.Style.STROKE);
        localPaint.setStrokeWidth(mStorkWidth);
//        localPaint.setStrokeWidth(1);
        localPaint.setColor(getResources().getColor(R.color.color_f0f0f0));
        for(int i = 0;i < childCount;i++){
            View cellView = getChildAt(i);
            if((i + 1) % column == 0){
                canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint);
            }else if((i + 1) > (childCount - (childCount % column))){
                canvas.drawLine(cellView.getRight(), cellView.getTop(), cellView.getRight(), cellView.getBottom(), localPaint);
            }else{
                canvas.drawLine(cellView.getRight(), cellView.getTop(), cellView.getRight(), cellView.getBottom(), localPaint);
                canvas.drawLine(cellView.getLeft(), cellView.getBottom(), cellView.getRight(), cellView.getBottom(), localPaint);
            }
        }
        if(childCount % column != 0){
            for(int j = 0 ;j < (column-childCount % column) ; j++){
                View lastView = getChildAt(childCount - 1);
                canvas.drawLine(lastView.getRight() + lastView.getWidth() * j, lastView.getTop(), lastView.getRight() + lastView.getWidth()* j, lastView.getBottom(), localPaint);
            }
        }
    }

}
